Have unlocked a couple of Xbox achievements, however since update I have not unlocked any achievements
Have been logged in to my Xbox live account and met all achievement requirements for 'Pork Chop' and 'Aquire Hardware' achievement but it has not unlocked. Checked in achievement community forums and this appears to be an issue with a number of people
Thank you for your report. This issue was, however, submitted earlier as MCPE-10840. Please perform a search next time to make sure your bug hasn't already been reported. The parent issue can easily be found by searching for "mcpe unresolved achievement".